102
Changes in Voltage and Current Readings
The following status of voltage and ampere readings on the digital gauges should be checked. The gauges
are located to the left of the operating modes selector panel.
Voltage
As the vehicle accelerates or is otherwise driven by the motor, the average voltage will decrease indi-
cating that current is coming out of the Traction Battery Packs. Voltage will drop some during any
acceleration.
During braking, the regenerative braking system will return current to the Traction Battery Packs
causing an increase in voltage. This recaptured energy will increase in the vehicle operating range.
Current
Current on start-up will be a nominal -6 to -9 amps.
Current will read negative (-) when power is being supplied by the traction battery system.
Current will read positive (+) when power is being supplied to the traction battery system (regenera-
tive braking - system charge).
Start-Up Problems
The following conditions / problems may occur when attempting to start the electric drive system:
Bus electronic systems do not come on when key is turned to ignition,
This situation indicates the 12 volt battery may be dead. This battery is located in the compartment below
the circuit panel outside the driver’s window. The release latch is inside driver’s wall just behind the driver’s
seat.
Jump starting the 12 volt battery will allow for drive operations, but battery should be checked and either
charged or replaced as indicated.
Possible blown fuses.
Check bus fuse panel (outside front of bus behind driver’s wiper.
Check Motor Controller fuses (in right side rear compartment)
Check F1 & F2 on Relay Box (in right side rear compartment)
Operating modes selector panel lights do not come on at second ignition position. This indicates electric
drive start failure
12 volt battery is dead (jump start as indicated below)
Possible blown fuses inside fuse panel.
System battery connections disconnected.
System batteries not charged.
System battery charging system connected.
Motor controller failure.
Each of these situations require checking traction battery system charge status, 12 volt battery charge
status, all applicable fuses.
In the event of motor controller or motor failure contact the manufacturer for assistance.
It is possible to jump start the 12 volt system. In the case of 12 volt battery being dead, the reason must be
diagnosed and if recommended, the 12 volt battery may be changed out for a normal 12 volt auto battery.
Start-up may appear to have been successful, however the bus will not move when either (D) or (R) is
selected. This condition will occur if the charging system has not been disconnected. There is an interlock
switch located in the charging compartment door that disables the power bridges to the bus electronics. The
charge connection must be disconnected and the door closed and locked prior to the bus being started.
DRIVING DO’S and DON’TS
The following paragraphs include information for efficient and safe operation of the vehicle.
In the Event of Breakdown
If the vehicle breaks down while in your use, pull closely and safely to the side of the road and activate the
emergency flashers. Immediately notify the appropriate department. DO NOT attempt any repair of the
vehicle.
Summary of Contents for TC/2000
Page 1: ...Owner s Manual TC 2000 ...
Page 3: ...2 ...
Page 106: ...105 NOTES ...
Page 111: ...Part Number 1919331 Blue Bird Corporation P O Box 937 Fort Valley GA 31030 ...
